How to solve issues with your Callback Handler?

There can be several reasons why a callback handler doesn’t work, although this is usually because the handler isn’t contactable for some reason. To check if your handler logic works you can test it using our callback handler test tool. If your callback handler still doesn't work you should check that none of the following problems apply.

The third potential problem is that the web host may be blocking requests from GrabzIt. This can sometimes happen if you have been requesting a large number of captures resulting in a large number of callbacks that some hosting companies can misinterpret as a Denial of Service Attack.